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Bumi Aksara, 2004
Buku Teks
Gusti Ayu Indira, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 1991
UI - Skripsi (Membership)
Amstrong, Michael
Crest Publishing House, 2002
Buku Teks
Dessler, Gary, 1942-, author
Prentice-Hall, 2003
Buku Teks
Martocchio, Joseph J., author
Pearson Prentice Hall, 2009
Buku Teks